Jan 16, 2024

01E
Two Stage Type Directional and Flow Control Valves
ELDFHG-04/06
Notice of Model Change

The proportional solenoid directional/flow control valves have recently undergone a model change to a
20-design by changing the pilot valve and the differential transformer (LVDT) for spool position detection.
■Major Changes
External dimensions (overall length) of [ELDFHG-04] have been reduced.
■Mounting Interchangeability
Interchangeable; the dimensions of the cable outlet of the ELDFHG-04 have been changed. For details,see No. 2 Dimensions.
■Model Number Designation
The design number is updated to 20. Model number designation remains unchanged.
ELDFHG- 04

SeriesNumberValve
Size

Rated Flow
L/min
Valve Press.
Diff. 1MPa(4-Way Valve)04

280：280

ELDFHG：High
Response(Two Stage)
Type
Proportional
ElectroHydraulic
Directional
andFlow Control
Valves(Sub-PlateMounting)- 280- 3C2P

- XY

-E

T-20

Spool Type

Directionof Flow

Pilot
Connection

Drain
Connection

DesignNumber

XY：
Meter-inMeter-out

None：
Internal Pilot
E：
External Pilot

None：
External
Drain
T：
InternalDrain

3C2：Normal Overlap
3C40：A,B,T Connection
3C2P：Zero Lap
06

350：350
500：500

20No.1■Specifications
The following specifications have been changed (other specifications remain unchanged).
Category
Step0→100%
Response
Frequency(±25％amplitude)
Response(-90°phase delay)
Water - Proofness

Old

04

06
350: 15 ms
13 ms
500: 18 ms
350: 44 Hz
46 Hz
500: 39 Hz
IP64 equivalent

New

04

06
350: 14 ms
14 ms
500: 17 ms
350: 43 Hz
42 Hz
500: 38 Hz
IP65 equivalent■Applicable Power Amplifiers
Remain unchanged.
■Timing of Release
Upon depletion of current stock■Dimensions
The following external dimensions have been changed (dimensions other than those listed below
remain unchanged).
Model Number

AB

CDEF

Old

ELDFHG-04-※-※-※-※-※-※-1077

341

82

136

194

206

New

ELDFHG-04-※-※-※-※-※-※-20

58323

83.4

134.5

192

204

Old

ELDFHG-06-※-※-※-※-※-※-1055

96

162

220

232

New

ELDFHG-06-※-※-※-※-※-※-2055(same)

97.4

160.5

218

230

350: 371
500: 375
350:371(same)
500:375(same)■Details

For details [specifications and external dimensions] of the new 20 design, please refer to the externaldimensions drawings to be published soon.
Model Number

External Dimensions Drawing Number

ELDFHG-04-※-※-※-※-※-※-20634-VA331116-4

ELDFHG-06-※-※-※-※-※-※-20635-VA331117-2

No.2

Viscosity : 30 mm2/s
Flow Rate

ELDFHG-04-※-3C2P

L/min

Input Voltage V DC

Input Voltage V DC
Flow Rate

L/min

L/min

Flow Rate

ELDFHG-06-※-3C2P

Input Voltage V DC

流量

Flow Rate

ELDFHG-06-※-3C2/3C40

L/min

Flow Rate

Input Voltage V DC

L/min

Input Voltage V DC

Input
Voltage V DC
入力電圧

入力電圧
Input Voltage V DC

L/min

Flow Rate

流量Flow Rate

Input Voltage V DC

L/min

Flow Rate

ELDFHG-04-※-3C2/3C40

L/min■Input Voltage vs. Flow Rate
〈Terms〉Valve Press. Diff. : 1 MPa■Load Flow Characteristics〈Terms〉Viscosity : 30 mm2/s
ELDFHG-06

Flow Rate

Flow Rate

L/min

L/min

ELDFHG-04

Load Press. Diff.

MPa

Load Press. Diff.

MPa

No.3

■Step Response (Example)〈Terms〉●Hydraulic Circuit : Port A/B Closed ●Supply Pressure : 14MPa●Input Signal : 0 ⇔ 100％ ●Viscosity : 30 mm2/s

Travel of Spool%

ELDFHG-06-500

StepSignal

Travel of Spool%

ELDFHG-06-350

Travel of Spool%ELDFHG-04

StepSignal

StepSignal→ Time→Time→ Time

StepSignal

StepSignal

Travel of Spool%

Travel of Spool%

Travel of Spool%

StepSignal→ Time→ Time→ Time

■Frequency Response (Example)〈Terms〉●Hydraulic Circuit : Port A/B Closed ●Supply Pressure : 14MPa ●Input Signal : 0±25％●Viscosity : 30 mm2/s
ELDFHG-04

ELDFHG-06-350

ELDFHG-06-500

Frequency Hz

Frequency Hz

Frequency Hz
Gain

Phase

Phase deg.

Gain dB

Phase

Gain
Phase deg.

Gain dB

Phase

Phase deg.

Gain dB

Gain★The step response and frequency response characteristics are measured for the valve alone.
The characteristics therefore vary depending on the respective circuit used.

No.4